Next room had big reptilian statue with flames around it’s head (illusion). Lots of small statues of Iderisis had their heads chopped off. We got a quest to destroy the serpent folk factions.

The next room had the spire and an alter. There was a caster guy and dark naga. They fled (600 exp), (1200 exp) There was a snake swarm around the spire (400 exp)
Loot:
6x death masks (2000gp value total)

The room beyond had guys waiting in wait. I sent the elementals through to get em. (500 exp) There were ogrekin and a quickling